Finding the Fourth Proportional to 128,562.24, 177,433.56 and 77,577.60
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Solution
The fourth proportional to 128,562.24, 177,433.56 and 77,577.60 is: 107,067.75
Step by Step Solution
- Step 1: Write the proportion equation
128,562.24 : 177,433.56 = 77,577.60 : x - Step 2: Convert to fraction form
128,562.24/177,433.56 = 77,577.60/x - Step 3: Cross multiply
128,562.24x = 177,433.56 × 77,577.60 - Step 4: Simplify right side
128,562.24x = 13,764,869,744.26 - Step 5: Solve for x
x = 13,764,869,744.26/128,562.24 - Step 6: Final answer
x = 107,067.75
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.